多分支U型井闭式地热开采数值模拟研究
Numerical Simulation Study on Closed-Loop Geothermal Extraction Using Multi-Branch U-Shaped Wells
DOI: 10.12677/jogt.2024.464048, PDF,  被引量   
作者: 刘 倩：成都理工大学能源学院(页岩气现代产业学院)，四川 成都
关键词: 废弃油气井；多分支U型井；地热开采；闭环取热；Abandoned Oil and Gas Wells； Multi-Branch U-Shaped Well； Geothermal Extraction； Closed-Loop Heat Extraction
摘要: 本文提出将废弃油井改造为多分支U型井的地热系统，并采用数值模拟方法建立了相关模型，研究了工程注采方案和不同井布参数对采热性能的影响。研究结果表明，随着开采时间的延长，采出温度和取热功率逐渐下降。较高的注入温度能够提升采出温度，但不利于取热功率的提高；增加注入流量虽然降低了采出温度，但显著提高了取热功率。此外，延长长度和增大水平井段间距均有助于提高采出温度和取热功率，在研究范围内的最佳水平段长度为1600 m，最佳水平井段间距为150 m。
Abstract: This study proposes a geothermal system that converts abandoned oil wells into multi-branch U-shaped wells and establishes relevant models using numerical simulation methods to investigate the effects of engineering injection-production schemes and different well layout parameters on heat extraction performance. The results show that as the exploitation time increases, the production temperature and heat extraction power gradually decrease. Higher injection temperatures can increase production temperatures but are not conducive to improving heat extraction power; increasing injection flow rates, while lowering production temperatures, significantly enhances heat extraction power. Additionally, extending the length of horizontal well sections and increasing the spacing between horizontal well sections both contribute to improving production temperatures and heat extraction power. Within the scope of this study, the optimal horizontal section length is 1600 m, and the optimal spacing between horizontal well sections is 150 m.
文章引用：刘倩. 多分支U型井闭式地热开采数值模拟研究[J]. 石油天然气学报, 2024, 46(4): 392-402. https://doi.org/10.12677/jogt.2024.464048

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